Paul degexer



trio E,-

ArnNT PAUL DEGENER, OF BRUNSVICK, ASSIGNOR TO CARL SPAETER, OF

COBLENTZ, GERMANY. I v 7 PRQCESS OFPURIFYING WATER.

SPEGEFICATION forming part of Letters Patent No. 433,890, dated August5, 1890.

Application filed March 10, 1890. Serial No. 343,37 5. (Nospocime nsdPatented in Austria-Hungary November 1Q, 1838, No.

21,862 and Ito-40,263;

To all whom it may-concern.-

Be it known that I, PAUL DEGENER, doctor of philosophy and apothecary,asubjjoct of the Duke of Brunswick, residing at Brunswick, in theDukedom of Brunswick, German Empire, have invented. certain new anduseful Improvements in the Methods of Clarifying Liquids and SolutionsContaining Organic Im purities; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

A patent has been obtained for this invention in Austria-Hungary, No.21,862 and No. 40,263, vols. 38 and 22, dated November 10,

. The present invention relates toa process of clarifying liquids orsolutions containing orgenie substances-such as albumen, arabino, &3.which must be eliminated either on account of theirputrescentinfiuence or because their presence prevents the liberation ofother substances contained in the solution. This process is conducted inthe following manner: Magnesium carbonate is added to the liquid whichis to be clarified,and after time enough has elapsed to allow of itsaction such a quantity of magnesia or magnesium hydrate is mixed withthe solution that by the separation of the greater part of the organicsubstances, which then takes place, the liquid or solution thus treatedis rendered capable of being filtered. It must now be fittered, and

after the filtration sufiicient lime must be added to decompose themagnesium carbonate, which has been dissolved, and to leave at the sametime a slight surplus of lime in solution. The liquid is now filtered asecond time, and, if necessary, the lime in thesolution may then beprecipitated by carbonic acid.

In carrying out the above process the temperature of the-liquid is ofnoimportance,the

clarification being equally zwell eflfected in a cold or warm state. Byvarying the order mentioned above of adding the materials to.

clarify the liquid thesame purifyingy'efiect will be observed, althoughthe results are not quite so ood.

ing sutficientlime for the magnesium hydrate, so that atthis stage ofthe process magnesium hydrate will be formed, and at the same time .thenecessarysurplus of magnesium carbonate remains. Lastly,'the process maybe peru The process may be modified by. substitutformed byaddingasufficientquantityof lime at first, so that all the magnesiumcarbonate added before or after will be decomposed, a

small surplus of lime, however, remaining in solution. The clarifyingresults, however,

gained in this case-are not so good. Baryta and strontium orthecorresponding hydrates and saccharates may beemployed instead oflime.

Another modification of theprocess-abwe described consists in employinbicarbonate uids. For this purpose, instead of placing all or part ofthe magnesium carbonate into the.

sacchariferous or other solutions which are to be treated in themannerpreviously described,

the soluble form of magnesium carbonate will itself be formed andimmediately employed in the solution. g v

The following may serve as all-example, for

which as liquid to be treateda sugar solution has, been chosen, toillustrate the practical application of this modification of theprocess. Magnesia in solid form (magnesium monoxide or' magnesiumcarbonate) is treated with car bonic acid (of commerce) in a warmsolution of sugary-about as. obtained from saturated beet-root sirup,until it 'has dissolved, which.

will. easily take placeinasugar solutiomevejn it warm, without pressureand without producing incrystallizable sugar. The soluble magnesiumcarbbhatethus formed produces in beet-rootsirup or other rawsacchariferous.

sir-ups an excellent'separation as soon as the" equivalent amount ofquicklime, either in the 1 form of lime milk ei-ipowder, has been added,since the magnesium monoxide and carbonate of lime in forming andprecipitating take the non sacchariferous substances with them. About0.1 per cent. magnesium monoxide as bicarbonate of magnesium andabout-0.5 per cent: of liineare necessary to efiect the clarificat-ionunder normal conditions. This modi- 'fication of the processes in themethod at first described, takes place in exactly the same manner ifbaryta orstront-iuin be substituted for the lime-milk.

What I claim is Y The process of clarifying a liquid, which consists inprecipitating the organic impurities of equivalentsto precipitate themagnesia, and

' adding a chemical-such as carbonic acid+to i precipitate the excess ofthe said precipitant remaining in soluiion,"snbstantially as set forth.

In testimony whereof I afli-x my signature in presence of two Witnesses.

- PAUL DEGENER.

1 Witnesses:

LYMAN A. SPALDiNG; C. A. STARBUCK.

